EmissionLines (Spectra Classifier)

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util.sdss
Class EmissionLines

java.lang.Object
  util.sdss.EmissionLines

public class EmissionLines
extends Object
extends Object

Create a wavelength sorted list of quasar emission lines in observed reference frame from SDSS DR1.

By John Talbot, Nov 5, 2003

INPUT: dr1qso-by-plate.txt data file and one quasar FITS files per spectra

OUTPUT:

list sorted by wavelength of observed frame emission lines with the quasar in which it occurs
Centered running average histogram with 1, 2, 4, 8, 16, 32, 64 and 128 A bin sizes.
Histogram for one bin size and half-bin size shifted count

Field Summary
`static String`	`outputDirectory`

Constructor Summary
`EmissionLines()`

Method Summary
`static String`	`formatCount(int aCount)`
`static String`	`formatFloatCount(double aCount)`
`static List<Line>`	`getEmissionLines()` Get a sorted list of quasar emission lines in the observed frame from SDSS spectra.
`static List<Line>`	`getRandomLines(List<Line> lines, int number)` Monte-Carlo generation of a specified number of emission lines randomly generated with the same distribution as bin 64 histogram which simulated the smoothed emission line density distribution.
`static void`	`getStatistics(List<Line> lines, String fileName)` Get statistics from a list of quasar emission lines
`static void`	`getVarianceOfRandomLines(List<Line> lines, int aNumberOfSimulations)`
`static void`	`main(String[] args)`

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Field Detail

outputDirectory

public static final String outputDirectory

See Also:: Constant Field Values

Constructor Detail

EmissionLines

public EmissionLines()

Method Detail

main

public static void main(String[] args)

getVarianceOfRandomLines

public static void getVarianceOfRandomLines(List<Line> lines,
                                            int aNumberOfSimulations)
                                     throws IOException

Throws:: IOException

getEmissionLines

public static List<Line> getEmissionLines()
                                   throws IOException

Get a sorted list of quasar emission lines in the observed frame from SDSS spectra. Note: There is a many to one correspondence between a line and a quasar (i.e. several lines map to the same quasar)

Returns:: a list of quasar emission lines
Throws:: IOException

getStatistics

public static void getStatistics(List<Line> lines,
                                 String fileName)
                          throws IOException

Get statistics from a list of quasar emission lines

Parameters:: lines - a List of Line instances representing the quasar emssion lines
Throws:: IOException

formatCount

public static String formatCount(int aCount)

formatFloatCount

public static String formatFloatCount(double aCount)

getRandomLines

public static List<Line> getRandomLines(List<Line> lines,
                                        int number)

Monte-Carlo generation of a specified number of emission lines randomly generated with the same distribution as bin 64 histogram which simulated the smoothed emission line density distribution.

Parameters:: lines - a List of Line instances representing peaks in the real quasar emission line data.; number - the number of random lines to generate
Returns:: a list of quasar emission lines with the same distribution as the input list